HELP!!!! Inactive Suspension that wont go back up...

[khaledhajj]

Hello Guys,

again I see a talk about diagnostic tool AutiBoss. AutoBoss V30 is a great tool, but it is a universal tool and not a BMW dedicated tool. The professional BMW dedicated tools with troubleshooting capabilities are: GT1, OPS, OPPS and for the new models the best one is AutoLogic but it is a little bit expensive. Other tools for amatures or personal use (but BMW dedicated) are: CarSoft 6.5, BMW Scanner 1.36 (for older models OBDI & OBDII), V 1.4 (OBD II) and V 2.1 for the newer models. For more information email me. Khaled.

[igosal]

I finally took my X5 to a local mechanic last night. He really seems to know what he is talking about. He checked my air bags as the first thing and found a very small leak in the right side front Air bag for the strut. So, I need an Air Bag replacement on this. My dilemma is shall i change just the air bag or the whole strut? From Arnott, air bag alone is $319 and the whole re-manufactured strut is $369. And then shall i replace only the faulty one or both on the front? He also found Rear right side height sensor as faulty in the computer. The part # for this is 6 784 697.

[James 4.8is]

Sorry for the long wait! I finally took my X5 to the BMW dealer and they hooked up there PC to it. It said there was a problem with the ECU module. The tech said I needed a new one!!! But I told him to first just clear & reset the ECU module and that it was a false error! And to recalibrate the system. So he did. Everything works just great now! Haven’t had problems with it since!!! BMW!!!


P.S. A small shout to Gelafont! I.O.U a beer!

[Blue4.8is]

Originally Posted by James 4.8is

Well, it looks like we’re on the same boat! Went for a 4wheel alignment and after that I have the same message in my display tried all the fuses. All are ok, relay in back ok, but came across there is another relay under the air supply tank under the spire tire. Will be checking that today! If ok there is only one thing left. The ECU AIR SUPPLY CONTROL UNIT ($800 white box) in back where the spear tire is. Will keep you informed! P.S. Did you get yours fixed and if so, what was the problem?

James, very interested in where this relax under the air supply tank is. could you please point it out? I found a relay for the air suspension in the truck right side compartment by the fuses ( relay #6 according to realoem ) but could not locate any other relay that you are talking about.

PS. It seems that the X5s with the air suspension in the rear only have the relay right on the air compressor but not for FULL air suspension such as my 4.8is

[Blue4.8is]

Originally Posted by James 4.8is

Sorry for the long wait! I finally took my X5 to the BMW dealer and they hooked up there PC to it. It said there was a problem with the ECU module. The tech said I needed a new one!!! But I told him to first just clear & reset the ECU module and that it was a false error! And to recalibrate the system. So he did. Everything works just great now! Haven’t had problems with it since!!! BMW!!!


P.S. A small shout to Gelafont! I.O.U a beer!

How much did they charge to Reset it ?

[Blue4.8is]

Originally Posted by khaledhajj

Hi Guys,

First of all the ECU has nothing to do with it. Rather it is the HCU. Aparently it deactivated once you elevated the car and it got too much reading from the level sensors (you got one for each wheel). Moreover, when you run the car while elevated other systems will be affected which are linked to the HCU, wheel speed sensors etc.. like ABS, SRS, traction control. But some systems will return to normal state once the car is put on the ground and driven for a short while since they begin to pick up the correct readings again. But unfortunately, some which has precautionally deactivated completely (you can notive the button, on the left side of the steering wheel, of the Heigth control not lit. this has to be reactivated by a diagnostic tool. And hopefully it will return to normal. It is better not to drive the car while the air cushions are deflated coz this might damage thw rubber. if this does not work (God forbid) then search for a level sensor which has bent or displaced. Good luck. Khaled

Where is the HCU located?

[James 4.8is]

Originally Posted by Blue4.8is

James, very interested in where this relax under the air supply tank is. could you please point it out? I found a relay for the air suspension in the truck right side compartment by the fuses ( relay #6 according to realoem ) but could not locate any other relay that you are talking about.

PS. It seems that the X5s with the air suspension in the rear only have the relay right on the air compressor but not for FULL air suspension such as my 4.8is

Sorry, for the wait. It’s not under the pump. It’s beside the battery on the right side to rear side under a black plastic panel. Hidden from everyone. (WHY? ) And as for the price of the BMW PC hook up it depends on how well you know your service department at BMW. I paid 500:-Swedish Kroner (about $80.00) He reset and recalibrated the hole system. And as a bonus I had him lower it! We took a standard ride height of 710mm (28”inces) at all 4’s. Then we took a lowered ride height of 680mm at all 4’s (26 ¾ inches) then we raised it back to the standard height and manually set the values to fool the system to 740mm at all 4’s (29 1/8 inches) so the system thinks 680mm is the standard ride height of 710mm so my standard is now 680mm! And my 4x4 ride height is 710mm and lowered all the way down to 650mm. “OBS” These are my ride heights! Yours may vary from these! So do your own measuring to find yours.
To sum things up:
4x4 height: OEM: 740mm Mine: 710mm
Standard OEM: 710mm Mine: 680mm
Lowered OEM: 680mm Mine: 650mm

P.S. make sure you are on level ground!
Use an alignment rack to do this!!!
We took the measurements from the wheel arch to the lowest point of the rim!

P.S.S. BMW online WDS: WDS BMW Wiring Diagram System - X5 E53

[Blue4.8is]

Cant find that black box...

[James 4.8is]

Originally Posted by Blue4.8is

Cant find that black box...

It should be under this "BIG" black box! You cannot miss it! Lol...